A volume containing a manuscript copy of 'Δαιμονιωδησ: or The Ungratefull Dæmon Dispossessed. Being, A Second Reply to ye Rage & Ravings of J. Partridge: design'd for ye recovery of his Senses againe, w[hi]ch have bin lately Shipwrack'd in ye Rough Seas of Ingratitude, Immorality, Scandall, &c', being an unpublished sequel by the astrologer John Gadbury to his previously published attack upon his former pupil, the astrologer and almanac-maker John Partridge, entitled A Reply to that Treasonous and Blasphemous Almanack for 1687 (London, 1687, Wing R1065A). Textual emendations by the scribe throughout the work suggest it to be a holograph copy, probably written in about 1690 (see the reference on f. 9 to Partridge's Almanack of 1690).
The rivalry between Gadbury and Partridge was political as well as personal; the former had Roman Catholic sympathies and supported James II, whereas the latter was Protestant and fled to Holland after the Duke of Monmouth's rebellion, not returning to England until 1689. Gadbury's Almanack of 1689, in which he predicted the triumph of James II over William of Orange, is dedicated to Sir Robert Owen of Brogyntyn and a copy in presentation binding is now at Glyn Hall (Inventory (1985), p. 123).

A collection of Welsh tracts on astrology, palmistry and the wheel of fortune, written in a seventeenth-century hand.

A printed astrological almanac, with manuscript entries.

Treatises and notes on the signs of the zodiac, the four elements, the planets, the sphere, geomancy, the astrolabe, astrology, etc.
Part of the manuscript is written in cryptic writing.

A manuscript of the Speculum Mathematicum sive de numerorum figuratorum resolutione of James Dowson of Chester (printed 1614), with astrological notes; and 'Shorte astrologicall judgments of the 12 howses of the heavens, first written by Gerrardus and after by Cornelius Agrippa augmented'.

A volume compiled, 1811-1830, by Thomas Llewellyn of the parishes of Cardigan and Ferwig, Cardiganshire, chiefly containing arithmetical exercises but also miscellaneous notes and memoranda in English and Welsh, perhaps partly composed by him and partly derived from printed sources. These include a bidding letter for the marriage of Mary Owen and John Williams, both of the parish of St Dogmaels, Cardiganshire, 1816; draft documents relating to property in Cardigan and Ferwig; love letters and verse in English, including a number of Valentine rhymes; prognostications in Welsh and English on the weather and on lucky and unlucky days, together with astrological notes; two apparently unpublished ballads in Welsh, one of them, perhaps by Thomas Llewellyn, recounting a case of alleged slander by Sara Evans, a Methodist, against the Rev. John Herring (1789-1832), Baptist minister at Cardigan; and a transcript of the title-page of The [Supposititious] Works of Aristotle (Arbroath, 1801) (not recorded in the Nineteenth Century Short Title Catalogue).

A manuscript volume, 1750-1758, compiled by Henry Young, perhaps of Tregaron, Cardiganshire, containing commonplace entries including notes on astronomy, astrology, physiology, weather lore (ff. 1 verso-3 verso) and Biblical and historical material, amongst which are extracts from R. B., The History of the nine worthies of the world (London: printed for Nath. Crouch..., 1687, STC C7337). Also included are model letters, extracts from poems by John Gay (ff. 6 verso, 30) and Alexander Pope (ff. 33 verso-35), valentines and other verse, medical and cookery recipes and recipes for ink and gilding, together with many related drawings and decorations in ink and polychrome.

A commonplace book of Robert Edwards, Tai Draw, near Bala. It contains notes on astrology, witchcraft, legerdemain, geography, natural history, Biblical history, medicinal and household recipes, arithmetical and other tables, algebraical problems, poems, and a copy of a Welsh letter written in 1722-3, by a man born and bred in America to his kindred in the Bala district.